I see it a few times a week
I see such spots all the time in my laser diagnostics, always due to dust specks on lenses and mirrors- I doubt it is on the ccd itself- that would appear as a few dark pixels... it must be on one of the imaging lenses...
As I said before- I dont think it is an important impact on the science, unless it is a pit on a lens... those can spread with thermal cycling- just adding my experience fed phobias :) sorry to raise concern...
This is just already another triumph... I think history will see it as more important than we do now...